<template>
  <div :class="className" :style="{height: height, width: width}" />
</template>

<script>
/**
 * vue3+echart5 遇到Cannot read properties of undefined (reading ‘type‘)
 * vue3中使用proxy的方式监听响应式，this.chart会被在vue内部转换成响应式对象，从而在resize 的时候获取不到
 */
// 第一步引入markRaw
import { markRaw } from 'vue'
import * as echarts from 'echarts'
import resize from './mixins/resize'

export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '350px'
    },
    autoResiize: {
      type: Boolean,
      default: true
    },
    chartData: {
      type: Object,
      required: true
    }
  },
  data() {
    return {
      chart: null
    }
  },
  watch: {
    chartData: {
      deep: true,
      handler(val) {
        this.setOptions(val)
      }
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart()
    })
  },
  beforeUnmount() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      // 第二步
      this.chart = markRaw(echarts.init(this.$el, 'macarons'))
      this.setOptions(this.chartData)
    },
    setOptions({ expectedData, actualData } = {}) {
      this.chart.setOption(
        {
          xAxis: {
            data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
            boundaryGap: false,
            axisTick: {
              show: false
            }
          },
          grid: {
            left: 10,
            right: 10,
            bottom: 20,
            top: 30,
            containLabel: true
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross'
            },
            padding: [5, 10]
          },
          yAxis: {
            axisTick: {
              show: false
            }
          },
          legend: {
            data: ['expected', 'actual']
          },
          series: [
            {
              name: 'expected', itemStyle: {
                color: '#FF005A',
                lineStyle: {
                  color: '#FF005A',
                  width: 2
                }
              },
              smooth: true,
              type: 'line',
              data: expectedData,
              animationDuration: 2800,
              animationEasing: 'cubicInOut'
            },
            {
              name: 'actual',
              smooth: true,
              type: 'line',
              itemStyle: {
                color: '#3888fa',
                lineStyle: {
                  color: '#3888fa',
                  width: 2
                },
                areaStyle: {
                  color: '#f3f8ff'
                }
              },
              data: actualData,
              animationDuration: 2800,
              animationEasing: 'quadraticOut'
            }
          ]
        }
      )
    }
  }
}
</script>
